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Title: Protein digestive dynamics of meat and bone meals in broiler chickens
Contributor(s): Macelline, Shemil P (author); McQuade, Leon R (author); Mclnerney, Bernie V (author); Moss, Amy F  (author)orcid ; Selle, Peter H (author); Liu, Sonia Y (author)
Publication Date: 2020-07-09
Open Access: Yes
DOI: 10.1016/j.aninu.2020.04.005
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Abstract: This study determined the variations in protein digestibilities and digestion rates in broiler chickens offered diets containing 7 different meat and bone meals (MBM). A total of 252 male Ross 308 broiler chickens were offered 7 atypical diets largely based on maize and MBM from 24 to 28 d post-hatch. Each experimental diet was offered to 6 replicates with 6 birds per replicate cage. Excreta were collected in their entirety from 25 to 27 d post-hatch and on 28 d post-hatch, digesta samples were collected from the proximal jejunum, distal jejunum, proximal ileum and distal ileum. Apparent digestibilities of protein were determined in each segment and apparent digestibilities of amino acids were measured in the distal ileum. There were significant differences in apparent protein digestibility coefficients in the proximal jejunum (P = 0.006), where broiler chickens offered the high ash beef meal (diet 7) generated the lowest protein digestibility in the proximal jejunum (0.318). Similarly, there were significant differences in apparent digestibility coefficients in the distal jejunum (P < 0.001) and distal ileum (P < 0.001) but not in the proximal ileum. More pronounced differences were found in the disappearance rate of protein and there were significant differences in all 4 segments of the small intestine (P < 0.001). Broiler chickens offered the high ash beef meal had the lowest protein disappearance rate (P < 0.001). No difference was observed in the predicted protein digestion rate (P = 0.486) but chickens offered the high ash beef meal had the lowest potential digestible protein (0.662, P = 0.034) whereas the highest potential digestible protein (0.739) was detected in diet 5 (containing a beef meal). This study contributed to the establishment of a preliminary database to include digestion rates of starch and protein into practical diet formulation.
Publication Type: Journal Article
Source of Publication: Animal Nutrition, 6(4), p. 521-528
Publisher: Zhongguo Xumu Shouyi Xuehui, Chinese Association of Animal Science and Veterinary Medicine
Place of Publication: China
ISSN: 2405-6383
Fields of Research (FoR) 2008: 070204 Animal Nutrition
Fields of Research (FoR) 2020: 300303 Animal nutrition
Socio-Economic Objective (SEO) 2008: 830503 Live Animals
Socio-Economic Objective (SEO) 2020: 100699 Primary products from animals not elsewhere classified
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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